Cross double-engine shaftless rim driving propeller

Abstract

The invention discloses a crossed double-engine shaftless rim-driven propeller which comprises a propeller shell, a power module, a blade set, a steering module, a sealing module and an intelligent control module. Compared with the prior art, water outlets of two flow guide flow channels of the crossed double-engine shaftless rim-driven propeller are arranged in a crossed mode; through the cooperation of the two power modules and the fluid flow fields generated by the two power modules, thrust dispersion is effectively avoided, thrust is more concentrated, thrust dispersion is reduced, fluid kinetic energy generated by the two power modules is effectively aggregated, and the efficiency of the propeller is remarkably improved.

Description

Technical Field

[0001] The present invention relates to the field of ship propellers, and in particular to a cross-double-engine shaftless rim-driven propeller. Background Art

[0002] At present, propellers are widely used as a power system in the field of ships. Whether in the military or civilian fields, propellers play an indispensable role in the navigation efficiency of ships. Existing propellers often use propellers for propulsion. When the propeller moves underwater, the shaft is often entangled by water plants, which affects the transmission efficiency and is highly dangerous.

[0003] CN114987725 A discloses a high-efficiency shaftless rim propeller, which can improve ship propulsion efficiency and reduce noise. However, the main limitation of the shaftless rim propeller is that it is only equipped with a single engine, resulting in relatively low propulsion power, lower space utilization and energy transfer efficiency than the cross-twin engine rimless shaftless propeller, and high maintenance cost.

[0004] CN116215820A discloses a vector type shaftless pump-jet propeller, which adjusts the installation position of the traditional propeller body, and does not need to be disassembled for convenient and labor-saving adjustment, which improves the flexibility of the propeller direction adjustment when the ship is running at different speeds. However, the rotation module of the vector type shaftless pump-jet propeller is not convenient for heat dissipation, which reduces the working efficiency of the propeller, thereby limiting the navigation efficiency of the ship.

[0005] In order to achieve the thrust required by the design, two engines are often used to drive two thrusters, such as propellers, to work together. It is generally believed that when two thrusters are arranged in the same direction, the maximum vector force can be generated. But in fact, the flow fields of parallel thrusters may partially interfere with each other, resulting in incomplete thrust directions, especially when the distance between the flow channels of the two thrusters is close, the staggered flow of the fluid may cause vortices to be generated, which in turn affects the propulsion efficiency and causes energy waste. Summary of the invention

[0006] The purpose of the present invention is to overcome the above-mentioned technical deficiencies and propose a cross-dual-engine shaftless rim-driven propeller to solve the technical problem in the prior art that the flow fields of two parallel-arranged propellers interfere with each other, resulting in energy waste and reduced efficiency.

[0007] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: The present invention provides a cross dual-engine shaftless rim-driven propeller, comprising: a propeller housing, a power module, a blade assembly, a steering module, a sealing module and an intelligent control module. The propeller housing is formed with a flow guide channel, and two ends of the flow guide channel are respectively formed with a water inlet and a water outlet; The power module is arranged in the diversion flow channel. The power module includes a first stator, a first rotor and a first water-lubricated bearing. The first stator is fixedly embedded in the inner wall of the thruster housing. The first rotor is embedded in the inner wall of the outer shell and is rotatably connected to the first stator through the first water-lubricated bearing; The blade group includes a plurality of blades and a plurality of leading blades. The plurality of blades are arranged in the diversion flow channel and are fixedly connected to the first rotor. The first rotor can drive the blades to rotate around the axis of the diversion flow channel. The leading blades are arranged in the diversion flow channel and are located on the side of the blades close to the water inlet. The leading blades are fixedly connected to the inner wall of the thruster housing; The steering module includes a housing, a second stator, a second rotor, a second water-lubricated bearing and a drive shaft. The second stator, the second rotor and the second water-lubricated bearing are arranged in the housing. The second stator is fixedly connected to the housing. The second rotor is rotatably connected to the housing through the second water-lubricated bearing. The second water-lubricated bearing is also fixedly connected to the drive shaft. The drive shaft extends from inside the housing to outside the housing and is fixedly connected to the thruster housing; The intelligent control module includes a sensor detection system, a data processing system, a regulation system and an equipment operation abnormality detection system, which are used to control the speed and steering of the cross-dual-engine shaftless rim drive thruster; The sealing module includes an axial oil seal, a sealing ring and a silicone electronic potting adhesive, which are used to seal the intelligent control module.

[0008] In some embodiments, the thruster housing is formed with two diversion flow channels in the same horizontal plane. The orientations of the water outlets of the two diversion flow channels are arranged crosswise, and the power modules are respectively arranged in the two diversion flow channels.

[0009] In some embodiments, the angle between the orientations of the two water outlets is between 30° and 45°.

[0010] In some embodiments, the diversion flow channel includes a constant section and a tapered section. The constant section is close to the water inlet and has the same cross-sectional area everywhere. The tapered section is close to the water outlet and the cross-sectional area of the tapered section gradually decreases along the direction towards the water outlet; the power module is arranged in the constant section.

[0011] In some embodiments, the second rotor includes an upper-side rotor disposed above the second stator and a lower-side rotor disposed below the second stator. The bearing includes an upper-side bearing disposed above the second stator and a lower-side bearing disposed below the second stator. The upper-side rotor is rotatably connected to the housing through the upper-side bearing, and the lower-side rotor is rotatably connected to the housing through the lower-side bearing.

[0012] In some embodiments, the second stator includes an iron core holder and a plurality of iron cores. The iron core holder fixedly connects the housing and each of the iron cores. The iron cores are formed with through holes for cooling water flow, and the housing is also formed with a plurality of through holes for cooling water flow. Water flows in from the through holes on the housing, enters the air gap between the second stator and the second rotor, cools and lubricates the second stator and the second rotor, and then flows out from the notch in the lower rotor frame to the through holes of the housing.

[0013] In some embodiments, the material of the water-lubricated bearing is artificial diamond.

[0014] In some embodiments, the outer wall of the second rotor is equipped with a magnetic steel group. The second rotor utilizes high thermal conductivity redundant sealing technology, and the second stator and the magnetic steel group are sealed with a high thermal conductivity polymer-based material by potting.

[0015] In some embodiments, the sensor detection system detects the speed of the cross-dual-engine shaftless rim drive thruster, the blade rotation speed, and the vibration data of the cross-dual-engine shaftless rim drive thruster. The data processing system collects the data collected by the sensor detection system to evaluate the health status of the cross-dual-engine shaftless rim drive thruster. The regulation system can change the motor output power, change the blade rotation speed, and thus change the water outlet speed. The equipment operation anomaly detection system can detect whether the thruster is entangled by marine foreign objects, detect whether the motor operating temperature is normal, and perform equipment operation anomaly processing.

[0016] Compared with the prior art, the two diversion flow channel water outlet directions of the cross-dual-engine shaftless rim drive thruster provided by the present invention are arranged crosswise, enabling the synergistic effect of the fluid flow fields generated by the two power modules, effectively reducing the spread of thrust, effectively aggregating the fluid kinetic energy generated by the two, and significantly improving the efficiency of the thruster. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the water inlet side of the cross-dual-engine shaftless rim drive thruster provided by an embodiment of the present invention; Figure 2 is a schematic structural diagram of the water outlet side of the cross-dual-engine shaftless rim drive thruster provided by an embodiment of the present invention; Figure 3 It is a cross-sectional view inside the diversion flow channel; Figure 4 It is a cross-sectional view of the steering module; Figure 5 It is the control flow chart of the intelligent control module; Figure 6 It is the composition diagram of the present cross double-engine shaftless rim drive thruster. Specific implementation manner

[0018] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0019] In order to solve the technical problem that the flow fields of two parallelly arranged thrusters will interfere with each other, resulting in energy waste and efficiency reduction, the present invention provides a cross double-engine shaftless rim drive thruster, which can effectively reduce the dispersion of thrust through the synergistic effect of the fluid flow field, so that the fluid kinetic energy generated by the two is effectively aggregated, and the efficiency of the thruster is significantly improved.

[0020] Please refer to Figures 1 to 6 , the present cross double-engine shaftless rim drive thruster includes: a thruster housing 1, a power module 2, a blade group, a steering module 3, a sealing module and an intelligent control module.

[0021] The thruster housing 1 is formed with a diversion flow channel, and water inlets 11 and water outlets 12 are respectively formed at both ends of the diversion flow channel; The power module 2 is arranged in the diversion flow channel. The power module 2 includes a first stator 21, a first rotor 22 and a first water lubricating bearing. The first stator 21 is fixedly embedded on the inner wall of the thruster housing 1, and the first rotor 22 is embedded on the inner wall of the outer shell and is rotatably connected to the first stator 21 through the first water lubricating bearing; The blade group includes a plurality of blades 23 and a plurality of leading blades 24. The plurality of blades 23 are arranged in the diversion flow channel and are fixedly connected to the first rotor 22. The first rotor 22 can drive the blades 23 to rotate around the axis of the diversion flow channel. The leading blades 24 are arranged in the diversion flow channel and on the side of the blades 23 close to the water inlet 11. The leading blades 24 are fixedly connected to the inner wall of the thruster housing 1; the first rotor 22 can drive the blades 23 to rotate around the axis of the diversion flow channel, driving water to flow from the water inlet 11 to the water outlet 12 to form thrust.

[0022] The steering module 3 includes a housing 31, a second stator 32, a second rotor 33, a second water-lubricated bearing 34, and a drive shaft 35. The second stator 32, the second rotor 33, and the second water-lubricated bearing 34 are disposed within the housing 31. The second stator 32 is fixedly connected to the housing 31. The second rotor 33 is rotatably connected to the housing 31 through the second water-lubricated bearing 34. The second water-lubricated bearing 34 is also fixedly connected to the drive shaft 35. The drive shaft 35 extends from within the housing 31 to outside the housing 31 and is fixedly connected to the thruster housing 1. The intelligent control module includes a sensor detection system, a data processing system, a regulation system, and a device operation anomaly detection system, for controlling the speed and steering of the cross-hybrid shaftless rim drive thruster. The sealing module includes an axial oil seal, a sealing ring, and silicone electronic potting adhesive, for sealing the intelligent control module.

[0023] In some embodiments, the thruster housing 1 is formed with two of the diversion channels in the same horizontal plane. The orientations of the water outlets 12 of the two diversion channels are arranged crosswise, that is, the included angle α between the orientations of the two water outlets 12 is an acute angle. The power modules 2 are respectively disposed within the two diversion channels. By arranging the orientations of the water outlets 12 of the two diversion channels crosswise, the synergistic effect of the fluid flow fields generated by the two power modules 2 effectively reduces the dispersion of the thrust, enabling the effective aggregation of the fluid kinetic energy generated by the two, and significantly improving the efficiency of the thruster.

[0024] Moreover, by combining the two power modules 2 in a centralized position, not only is the space utilization optimized, but also the number of required structures and components is reduced. This design can effectively improve the propulsion power density and simultaneously enhance the space utilization efficiency of the ship, especially suitable for application scenarios that require high-efficiency propulsion and compact space.

[0025] In some embodiments, the angle of the included angle between the orientations of the two water outlets 12 is between 30 - 45°.

[0026] In some embodiments, the diversion channel includes a constant section 13 and a tapered section 14. The constant section 13 is close to the water inlet 11 and has the same cross-sectional area at each location. The tapered section 14 is close to the water outlet 12 and the cross-sectional area of the tapered section 14 gradually decreases along the direction towards the water outlet 12. The power module 2 is arranged within the constant section 13.

[0027] According to the continuity equation (Q = Av = constant), when the fluid flows through the converging section 14, the flow velocity will increase significantly. After the fluids generated by the two power modules 2 converge, their momentum vectors (mv) are superimposed. The converging flow channel forces the two fluids to form a co-directional laminar flow, avoiding the momentum loss caused by the turbulent collision commonly seen in traditional circular outlets.

[0028] In some embodiments, one side of the two water outlets 12 adjacent to each other is interconnected to jointly form a peanut-shaped water outlet structure. According to Bernoulli's principle, an increase in flow velocity will lead to a decrease in the static pressure of the fluid. Through the conversion of pressure energy into kinetic energy in the converging section 14, a low-pressure area is formed at the peanut-shaped water outlet. This pressure reduction effect can reduce the resistance of the fluid at the water outlet and further optimize the flow efficiency of the fluid, which is specifically manifested in the following two aspects: one is the drainage effect, where the low-pressure area attracts the fluids on both sides to accelerate and converge towards the center, reducing the boundary layer separation. The other is the kinetic energy focusing. When the fluid enters the peanut-shaped water outlet, the streamlines are forced to focus. This focusing effect makes the fluid flow fields generated by the two thrusters more concentrated, weakening the diffusion and energy loss of the fluid at the water outlet. The length of the core region of the synthesized jet increases, significantly enhancing the far-field thrust transfer efficiency.

[0029] In some embodiments, a fish-scale-like convex structure is formed on the surface of the blade 23. It can guide the water flow to pass through the blade 23 along a smoother path, reducing the eddies generated by the boundary layer separation. The smaller eddies reduce the mechanical disturbance of the water flow impacting the blade 23, thereby reducing the vibration and noise generated by the blade 23. The fish-scale-like surface design optimizes the hydrodynamic characteristics of the surface of the blade 23 by reducing the boundary layer separation, making the water flow more evenly distributed on the surface of the blade 23, thereby reducing the viscous resistance of the fluid and improving the propulsion efficiency.

[0030] When the thruster is working, the blade 23 rotates and the guide vane 24 remains stationary. The guide vane 24 can guide the water flow to enter the rotating blade 23 in a desired direction and speed. It increases the pressure of the water flow, optimizes the working conditions of the blade 23, protects the thruster from adverse flow conditions, and improves the propulsion efficiency. At the same time, it reduces the eddies generated before the water flow enters the blade 23, thereby reducing the noise generated by the thruster.

[0031] In some embodiments, the second stator 32 includes an iron core holder 321 and a plurality of iron cores 322. The iron core holder 321 is fixedly connected to the housing 31 and each iron core 322. The iron core 322 is formed with a first through hole 3221 for the cooling water flow, and the housing 31 is also formed with a second through hole 311 for the cooling water flow. The inner side of the iron core holder 321 is sealed with glue injection, so that water flows through all parts except the coil part, greatly improving the heat dissipation efficiency of the steering module 3, thereby improving the working efficiency of the thruster and greatly improving the ship navigation efficiency. Specifically, the water flows in from the through hole on the housing 31, enters the air gap between the second stator 32 and the second rotor 33, cools and lubricates the second stator 32 and the second rotor 33, and then flows out from the notch in the lower rotor bracket to the through hole of the housing 31.

[0032] In a preferred embodiment, the steering module 3 adopts an axial flux motor, which has the characteristics of high power density and large torque, and can also be directly driven without a transmission system, with the advantages of low noise and small vibration. The second rotor 33 includes an upper side rotor 33A arranged above the second stator 32 and a lower side rotor 33B arranged below the second stator 32. The corresponding bearings 34 include an upper side bearing 34A arranged above the second stator 32 and a lower side bearing 34B arranged below the second stator 32. The upper side rotor 33A is rotatably connected to the housing 31 through the upper side bearing 34A, and the lower side rotor 33B is rotatably connected to the housing 31 through the lower side bearing 34B. The lower side bearing 34B provides a relatively large upward bearing capacity for the lower side rotor 33B, and the upper side bearing 34A provides a relatively small downward thrust for the upper side rotor 33A. The upward force is greater than the downward force to ensure its stability during operation.

[0033] In some embodiments, the material of the water-lubricated bearing is artificial diamond to enhance the bearing life.

[0034] It is easy to understand that the cross hybrid shaftless rim drive thruster also includes necessary electrical components. The electrical components are combined into a suitable working circuit and connect the electrical equipment to an external power source to provide electrical energy for it. Sealing structures are provided in parts that need to isolate water to avoid short circuits.

[0035] In some embodiments, the sealing module includes an axial oil seal, an O-ring and silicone electronic potting glue. The outer wall of the second rotor 33 is equipped with a magnet group. The second rotor 33 uses a high thermal conductivity redundant sealing technique, and the second stator 32 and the magnet group are sealed with a high thermal conductivity polymer-based material by potting glue. Each electronic component of the thruster is sealed with silicone electronic potting glue. The inner side of the stator electromagnet holder of the axial flux motor is sealed with silicone potting glue.

[0036] In some embodiments, the sensor detection system detects the speed of the cross - hybrid shaftless rim - drive thruster, the rotational speed of the blade 23, and the vibration data of the cross - hybrid shaftless rim - drive thruster. The data processing system collects the data acquired by the sensor detection system to evaluate the health status of the cross - hybrid shaftless rim - drive thruster. The regulation system can change the motor output power, change the rotational speed of the blade 23, and thus change the water output speed. The equipment operation anomaly detection system can detect whether the thruster is entangled by marine foreign objects, detect whether the motor operating temperature is normal, and perform equipment operation anomaly processing. The intelligent control module can adopt common modules in the art.

[0037] The specific embodiments of the present invention described above do not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and deformations made according to the technical concept of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A cross-double-engine shaftless rim-driven propeller, characterized in that: include: Propeller housing, power module, blade assembly, steering module, sealing module and intelligent control module, The propeller housing is formed with a flow guide channel, and two ends of the flow guide channel are respectively formed with a water inlet and a water outlet; The power module is arranged in the guide channel, and the power module includes a first stator, a first rotor and a first water-lubricated bearing, wherein the first stator is fixedly embedded in the inner wall of the propeller housing, and the first rotor is embedded in the inner wall of the housing and is rotatably connected to the first stator through the first water-lubricated bearing; The blade group includes a plurality of blades and a plurality of front guide blades, wherein the plurality of blades are arranged in the guide channel and fixedly connected to the first rotor, and the first rotor can drive the blades to rotate around the axis of the guide channel, and the front guide blade is arranged in the guide channel and located on a side of the blade close to the water inlet, and the front guide blade is fixedly connected to the inner wall of the propeller housing; The steering module includes a housing, a second stator, a second rotor, a second water-lubricated bearing and a drive shaft, wherein the second stator, the second rotor and the second water-lubricated bearing are arranged in the housing, the second stator is fixedly connected to the housing, the second rotor is rotatably connected to the housing through the second water-lubricated bearing, the second water-lubricated bearing is also fixedly connected to the drive shaft, and the drive shaft extends from the inside of the housing to the outside of the housing and is fixedly connected to the propeller housing; The intelligent control module includes a sensor detection system, a data processing system, a control system and an equipment operation abnormality detection system, which are used to control the speed and steering of the cross-double-engine shaftless rim-driven propeller; The sealing module comprises an axial oil seal, a sealing ring and an organic silicon electronic potting glue, which are used to seal the intelligent control module.

2. The cross dual-engine shaftless rim-driven propeller according to claim 1, characterized in that: The thruster housing is formed with two guide flow channels located in the same horizontal plane, the water outlets of the two guide flow channels are arranged in a cross direction, and the power modules are respectively arranged in the two guide flow channels.

3. The cross dual-engine shaftless rim-driven propeller according to claim 2, characterized in that: The included angle between the two water outlets is between 30° and 45°.

4. The cross dual-engine shaftless rim-driven propeller according to claim 1, characterized in that: The guide channel includes a constant section and a tapered section, wherein the constant section is close to the water inlet and has the same cross-sectional area at each location, and the tapered section is close to the water outlet and has a cross-sectional area that gradually decreases in a direction toward the water outlet; the power module is arranged in the constant section.

5. The cross dual-engine shaftless rim-driven propeller according to claim 1, characterized in that: The second rotor includes an upper rotor arranged above the second stator and a lower rotor arranged below the second stator, the bearing includes an upper bearing arranged above the second stator and a lower bearing arranged below the second stator, the upper rotor is rotatably connected to the casing via the upper bearing, and the lower rotor is rotatably connected to the casing via the lower bearing.

6. The cross dual-engine shaftless rim-driven propeller according to claim 1, characterized in that: The second stator includes an iron core holder and a plurality of iron cores, the iron core holder is fixedly connected to the casing and each of the iron cores, the iron core is formed with a through hole for cooling water to pass through, and the casing is also formed with a plurality of through holes for cooling water to pass through; water flows in from the through holes on the casing, enters the air gap between the second stator and the second rotor, cools and lubricates the second stator and the second rotor, and then flows out from the slots in the lower rotor frame to the through holes in the casing.

7. The cross dual-engine shaftless rim-driven propeller according to claim 1, characterized in that: The material of water-lubricated bearings is artificial diamond.

8. The cross dual-engine shaftless rim-driven propeller according to claim 1, characterized in that: The outer wall of the second rotor is equipped with a magnetic steel group, the second rotor uses high thermal conductivity redundant sealing technology, and the second stator and the magnetic steel group are sealed by glue injection using a high thermal conductivity polymer-based material.

9. The cross dual-engine shaftless rim-driven propeller according to claim 1, characterized in that: The sensor detection system detects the speed of the crossed dual-engine shaftless rim-driven propeller, the blade rotation speed and the vibration data of the crossed dual-engine shaftless rim-driven propeller. The data processing system collects the data collected by the sensor detection system to evaluate the health status of the crossed dual-engine shaftless rim-driven propeller. The control system can change the motor output power, change the blade rotation speed, and then change the water outlet speed. The equipment operation abnormality detection system can detect whether the propeller is entangled by marine foreign objects, detect whether the motor operating temperature is normal, and perform equipment operation abnormality processing.

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